Section 32. The provisions of sections twenty-eight, twenty-nine and twenty-nine A shall not apply to a manager or a motion picture operator or assistant operator licensed under sections seventy-five and seventy-six, respectively, of chapter one hundred and forty-three, who is employed in a motion picture theatre licensed under section one hundred and eighty-one of chapter one hundred and forty and the provisions of the state building code, in connection with a motion picture show exhibited in said theatre; provided that such manager, operator or assistant operator has no financial interest in the motion picture theatre wherein he is so employed; and provided, further, that such manager has no authority in determining which motion picture films are to be presented in said theatre.